Carbureter.



Patented .13.11.31, 1911.

H. A. MILLER.

CARBURETEB..

APPLICATION FILED MAB.. 3, 1910.

...5.1.11 @www1/# W 11 HARRY A. MILLER, OF LOS ANGELES, CALIFORNIA.

CARBURETER.

Application filed March 3,

To all whom it may concern.'

Be it known that I, Hanni' A. MiLLnn, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalitornia, have invented a @new anld useful Carbureter, of which thefollowing is a specification.

lThis invention relates to carbureters, and the main object of theinvention is to provide for mechanically operating the needle lvalveofthe nozzle through the medium of the air valve, whereby the amountotopening of the needle valve is directly propor' tioned to the amount ofopening of the air valve, and to provide means `for varying the time otopening of the needle valve with rela-tion to the air valve. Iaccomplish this by means of an adjustable cam shaped spring whichactuates a rock lever, the latter being in operative relation to theneedle valve. i

Another object of the invention is to provide -for mechanically openingthe air inlet simultaneously with the throttle valve and to open the airinlet an ,amount corresponding to the amount the vthrottle valve. is:opened, and to hold thesaid air inlet opened while the throttle valve isopen, thereby not depending upon suction and inrushingeair 30 to openthe air valve, with the advantage that fluttering of thc air valve isavoided, thus making the carbureter of special utility with engineshaving two cylinders or less where the intervals between impulses of theengine are of suilicient duration to produce appreciable flutteringmovement ot .the air valve.

Other objects and 'advantages will bev brought out in the followingdescription.

' Referring vto the drawings z-Figure 1 isv a cross sectional Viewthrough the carbu-l roter. Fig. 2 is a bottom view of the carbuf reter.

ward the nozzle 6 which is arranged-cenbeing provided with a whichisalso central ot thel trally of the sleeve 2, fuel passage 7 sleeve 2 andwhich is supplied from a ioat Specification of Letters Patent.

1910. Serial No. 547,157.

Patented Jan,` 331, 1911,

valve chamber 8. The upper end of the nozzle G has a cup shaped mouth 8which surrounds the tapered end of the needle valve 9, the latter beingsupported by a valve Arod 10 formed with a goose-neck and extendingdownthrough atube 11 in which a coil spring' 12 is arranged, the spring 12being connected at its lower end to thesteni 10 and the upper lend ofthe springbearing against the wall at the upper end of the tube 11,whereby the stem 10 is moved in a downward direction tending to closethe needle valve 9.

The lower end of the valve stem 10 rests against an adjusting screw 13in the end of a'rock lever 14 pivoted at 15 and provided `with a roller16 which is adapted to ride along a cam shaped spring 17, the lower endof spring 17 being forked and engaging a groove 18 in an adjustin scr-ew19. The cam spring 17 is secured to a racket 20 which pro-v jectsthrough an opening 21 in the lower portion oit' the Carloni-eter and isattached to the conical air valve 5 so that as the air valve 5 is movedin ,either direction the spring 17 is bodily moved therewith and actingaga inst roller 1G operates or controls the position of the rock lever14, thereby adjusting the position of the needle valve 9. i

Q2 designates the throttle valve which is/ arranged above the mixingchamber 3 and controlled by lever 23. A link 211'is connected at itsupper end to the throttle valve 22 and at its vlowerend is-conuected tothe sleeve 2, so that the sleeve Q and air valve 5 are movedlongitudinally wh enever the throttle valve Z2 is adjusted. valve 22 isin its extreme open position, as shown in Fig. 1, the'air valve 5 is4 inits highest position,'giving the fullest opening for the admissipn ofair which enters around aspreader 25 which arranged below thc nozzle 6.As air is sucked into the carbureter it enters past the spreader Q5 andis deflected toward the nozzle by the conical air valve 5.' rlhe amountof air which entersis,`

air valve 5 will occupy its lowest position, as

Aindicatedin dotted lines, leaving onlythe slightest opening between thespreader 25 and air valve.

As the air valve 5 approaches its lower or When the throttlesubstantially closed position, the caiffspring/ 17 lowers therewith andpermits the rock means of adjusting screws 19, it is possible to nearlyclose' the air valve and still leave the needle valve 9 open suiiicientto permit fuel to pass therethrough. As the air valve rises and opens,the cam spring 17 lifts and forces out. the end of the lever 14, therebylifting the stem 10 and opening the needle valve 9, permitting greaterflow of fuel. For a rich mixture, that is, one containing a largeproportion of `,'asolene to air, the adjusting screw. 18 may be.adjusted to secure a quick and fullopening of the needle valve 9whenever the air valve 9 opens.

'By screwing the spreader 25 up or down, the amount of normal airpermitted to enter, with the tube 5 in lower position, may be regulated.It is thus possible to adjust for a mixture rich with gasolene, ifdesired, for starting or sl'ow running, by nearly closing A, thespreader or -/vice versa.

What I claim is: Y.

1. ln a carbureter, a mixing chamber, a nozzle discharging into themixing chamber, an air valve below the nozzle for admitting air to themixing chamber, a throttle valve above the nozzle, a connection from thethrottle valve to the air valve for mechanically opening the air valvein unison with the throttle valve, a needle valve for said nozzle, alever bearing against the needle valve, and cam means carried by the airvalve for operating said lever to actua-te the needle valve.

2. ln a carbureter, a mixing chamber, a

nozzle discharging into the mixing chamber, an air valve below thenozzle for admitting air to the mixing chamber, a throttle valve,

above the nozzle, a connection from the throttle valve to the air valvefor mechanieally opening the air valve in unison with the throttle--valve, aneedle valve for the- 3. In a carbureter, a mixing chamber, aj

nozzle discharging into the mixing chamber, an air valve below thenozzle for admitting air to the mixing chamber, a throttle valve abovethe nozzle, a connection from the throttle valve to. the air valve formechanically opening the air valve in unison with the throttle valve, aneedle valve for the nozzle, a pivoted lever, an adjusting screw in oneend of the lever bearing against the stem of said needle valve, a screwcarried by the air valve, a spring having an adjustable end engagingsaid screw, and a roller in the end of said lever traveling on saidspring.

4. In a carbureter, a mixing chamber, a nozzle discharging i'nto themixing chamber, an air valve comprising a sleeve with a flared lower endslidable in the mixing chamber, and a spreader below the said flaredpo'rtion and adjustable toward and from the same to vary the size of theair inlet..

In testimony whereof, I have hereunto set my hand at Los Angeles,California, this 22 day of February 1910.

HARRY A, MILLER.

In presence of- G. T. HAGKLEY, FRANK L. A. GRAHAM.

